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I have noticed that the siding of single family homes in Colorado, at least my made-in-the-70's neighborhood, does not extend down to or into the ground. Why is this? Why not have siding (vinyl, brick, stucco, etc) go into the ground?

I seem to recall other buildings, such as apartments or schools, have siding that goes into the ground. Maybe this is just poor observation skills at work or due to sidewalks. This small gap between siding and concrete makes a wonderful little place for animals to get into the walls!

EDIT: How High Should The Siding Be Above Ground Level? does not answer this question. It's asking how high and I am asking why. The difference here is asking for a number and why you would even bother.

PipperChip
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2 Answers2

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Because constant moisture, from the ground, causes many materials to rot.

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Steve Wellens
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In areas where termites are active (which includes most of Colorado), any "edible" (to termites) material that is in contact with the ground gives termites an easy path to infiltrate your home. Termites dislike sunlight (it can kill them). If only the concrete foundation is in contact with the ground, the termites would have to build vertical tubes against the foundation, from the ground to the siding, in order to get into your home without being exposed to sunlight. But if the siding is in contact with the ground, they have a safe and easy path into your home.

According to Terminex:

  • Create a 4-inch barrier between mulch and your home. If possible, only the concrete foundation should touch the soil.
  • Keep wooden siding at least 6 inches above the soil.
Wayne Conrad
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